👉 Hemiopia is a condition in which one eye cannot focus on both objects at once. This can occur due to a defect in the retina or optic nerve, and it often affects one side of the visual field. The patient may also have difficulty seeing in both eyes, as well as difficulty focusing on close-up images or reading small print. Treatment options for hemiopia include corrective lenses, surgery, and possibly optometrists' advice to change your eyeglasses or contact lenses.